Construction of pilot lamps for motion picture apparatus



A. DINA June 13, 1933.

CONSTRUCTION OF PILOT LAMPS FOR MOTION PICTURE APPARATUS 2 Sheet s-Sheet 1 Filed July 23 1931 INVENTOR luyw/o fl/na.

BY 6/1: ATTORNEY! A. DINA June 13, 1933.

CONSTRUCTION OF PILOT LAMPS FOR MOTION PICTURE APPARATUS Filed July 25 1951 2 Sheets-Sheet 2 INVENTQR Joya/a fl/na.

BY /s ATTORNEYJ w An object of the invention tot provide Patented June 13, 1933 UNITE'DSTATES PATENT OFFICE seaweed DINA, or ntizannrrr, new m ssy, Assmuon "To IN E NATIONAL rnomc'ron conronarlon, or NEW.YORK, n. Y., a GORIQRATION or DELAWARE cmsmvcma orpmo sron Manon newer. Arr-Animus 1 A plication filed Ju1y 23,

.Thisinvention relates to new and useful improvements in mountingsjfor pilot lamps on motion picture apparatus, preferably pro- ,jectors. i

a simple, economical, durable, self-contained, efficient pilot lamp unitlwhich canbe read ly attached to and detached from the apparatus without involving any material alteration 1n 1 theconstructionofthe apparatus,andwith- I outseriously interfering with the operation of themachine; 1 y 1 A further object is to providea unltm which the lampis efliciently protected from injury while permitting the light fromthe lamp to properly fall on thefilm for the purpose ;of projection.

A still further object is to provide a unit in which the parts are soconstructed and 26 related that the lamp guard creasing can be instantly removed from or attached to the unit andis provided with means whereby it is always accurately supported on the unit when attachedthereto. I 1

the parts of which can be very quicklyand pair. Further and easily disconnected for replacement andrey oppositeside ofthe gate 10 is disposeda more specific objects, features "30 and advantages will more clearly: appear from a consideration Ofnthfl specification hereinaftertaken in connection with the accompanying drawings which form part of the' specificati'on and which illustrate a presentpreferred form of the invention.

wBriefiy the invention comprises a plate adapted to beattached to asuitable supp'ort- I ingpartition on the apparatus. Thislplate vijded with astop member which limits and advances its operative position when slid:

onto the guide-plate. The guide-plate is vention is illustrated in the Yet a further-object is to provide aunit tached.

1 931. Serial m 552.679.

attached to the main plateand extending into the casing. Adjacent the filament of the lamp the casing is provided with a suit-j able aperture so angularly related to the. lamp as to permit light therefrom to fall on an adjacent film aperture to permit the ready registration of the filmwith the aperu -1. a a

1 The present preferred formzof the indrawings, of, which:- a,.. 1M Fig. 1 is anend elevation of the unit mounted onthemachine; Fig. 2 is a .yertical section taken on the;

. Fig. 3 is a side elevation of the device, and. Q l Fig. 4 is a verticallongitudinalisection .taken on the line H of Fig. 2.

As illustrated in the drawingsthe present preferred form ofthe invention is especiaL ly applicable to motion picture apparatus, such as projectors provided with a film gate 10 adjacent which the film 11 is adapted topass. As shown in the drawings on the is provided with a vertical mechanism supw porting partition 14 and it isto this partition that the tapered funnel: or casing, 12 of the unit comprising the invention, is at:

This unit preferably comprises a main supporting plate 15' disposed vertically V against the partition letby means ofscrews:

is providedwithnn. outwardly extendingw 40 guide-plate from which a. lamp guard or .casing. :is slidably. supported, preferably 1 by means of cooperatim tongues. and grooves Jon the casing of the guic e-plate. Preferably the spring pressed pins on the guide-plate fricfi tionally engage the casing in order to retain it in position The casing is alsopro-.a

1 6.. Extending outwardly-from this main support 15 is a horizontal guiding and sup-.-

on the upper face of alarnp guard casing 20 which is open at its inner end and closed atfits outer. end. t ,On itsouter end it is provided withqan upstanding stopflange 21 adapted to abut the outer end of the guideplatelTwhen the casing 20 reaches its operative position. The guide-plate 17 has spaced apertures therein in which are mounted pins 22 and 23 having heads 24 and 25 to prevent their passing entirely through the aperture. These pins are pressed into the aperture by means of arms 26 and 27 preferably formed in one piece and held in position by means of screws 28 fastened to the guide-plate 17. These pins 22 and 23 frictionally bear on the upper surface of the tongue or rib 19 tohold it in position. The guard casing 20 is provided with a light opening 29 on the lower face thereof just above the tapered funnel 12 which is also providedwith an opening 30. These openings are so related that the light from the pilot lamp 31 projecting into the casing *20 will fall diagonally downward onto the aperture 32 in'the film gate and illuminate the film, enabling the operator to eflieiently and easily register his film properly. r

This lamp 31 is mounted in a socket 32 disposed on a suitable base 33 fastened by screws 34 to the main supporting plate 15. The guide-plate 15 on its outer end is also provided with 'an" upstanding flange 34 having a bore 35 in which is suitably mounted an electrical switch element 36 from which an operating handle 37 projects. The switch and the lamp are connected by suitable wiring such as 38 and 39 with desired circuits so that the lamp can be illuminated or extinguished by the operator moving the handle37 of the switch. Preferably this handle' is disposed on the-outer end of the unit so as to be readily accessible to the hand of the operator. Since the guard casing 20 is held in operative position merely by the frictional action of the pins 22 and 23 it is merely necessary for the operator to grasp the casing 20 in his hand and pullit outwardly thus slipping thetongue 19 out of the groove 18 and enablingthe lamp to be inspected, removed,

or replaced. The lamp unit itself can be,

removed by unscrewing the base 33 from the plate 15. The entire unit can be readily removed by removing the screws 16 thus enabling the plate 15 and the entire unit being dismounted from the partition 14;

It will readily be noted that the device is simple, durable, economical and efficient and practically self-contained; the various parts can be readily assembled and disassembled; the lamp can be readily inspected, replaced or repaired; and the device is disposed in'a convenient position adjacent the film gate and it is readily accessible to the hand of the operator; and the whole unit when assembled can, in a few minutes, be applied to and removed from the machine without in any material way affecting the arrangement and operation of the machine.

. While the invention has been described in detail and with respect to a present preferred form thereof it is not to be limited to such details and forms since many changes and modifications may be made in the invention Without departing from the spirit and scope of the invention in its broadest aspects. Hence it is desired to cover any and all forms and modifications of the invention which may come within the language or scope of any one or more of the appended claims.

What is claimed,'is:

1. A pilot light unit for motion picture projectors which comprises a supporting plate, a guide-plate extending therefrom, and substantially at right angles thereto, a pilot lamp mounted on the supporting plate and extending therefrom substantially par allel to. the guide plate, a guard casing for the lamp and a cooperating tongue and groove on the casing and the guide-plate permitting the slidable movement of the easing on the guide-plate.

2. A pilot lamp unit for motion picture projectors which comprisesv a supporting plate, a guide-plate extending therefrom and substantially at right angles thereto, and having a groove therein, a lamp casing adapted to beslidably disposed on the guide plate substantially parallel thereto, a tongue in the lamp casing sliding-111 said groove,

and resilient means on the guide-plate engaging the casing to retain it in operative position thereon.

3. A pilot lamp unit for motion picture projectors which comprises a supporting plate, a guide-plate extending substantially at right angles therefrom and having a groove therein, a lamp casing adapted to be slidably disposed on the guide plate in a direction parallel thereto, a tongue in the lamp casing sliding in said groove, resilient means on the guide-plate engaging the casing to retain it in operative position thereon,

said casing having a stop flange engaging the guide-plate when the casing is in operative position to define said position.

4. A pilot lamp unit for motion'picture projectors which comprises a supporting plate and a guide-plate extending substantially at right angles therefrom and having a groove therein, a lamp casing adapted to be slidably disposed on said guide plate in a direction parallel thereto, a rib on said casing slidable in said groove, pins on the guideplate extendingthrough apertures therein to frictionally contact with said rib and spring means on the guide-plate engaging said pins to force them into frictional contact with said rib.

5. A pilot lamp unit for motion picture projectors which comprises a supporting plate and a guide-plate extending substantially at right angles therefrom and having a groove therein, a lamp casing adapted to be disposed slidably on said guide plate in "plate, a lamp fastened to the supporting plate and extending horizontally beneath the guide-plate, a'casing around said lamp a and slidably mounted on said guide-plate,

' my hand.

a direction parallel thereto, a rib on said casing slidable in said groove, pins on the guide-plate extending through apertures therein to frictionally contact with said rib and spring means on the guide-plate engaging said pins to force them into frictional contact with said rib, said casing having an upturned flange on its outer end to limit its inward movement on said guide-plate.

6. A pilot lamp unit for motion picture projectors which comprises a vertical supporting plate, a horizontal extending guidesaid guide-plate having on its outer end an upturnedfiange and a switch element mounted on said flange, said casing having an upturned flange on its outerend tolimit i its lnward movement on the guide plate.

In testimony whereof I have hereunto set AUGUSTO DIN A. 

